open-iov.git - Open-IOV vGPU-IO: host-side GSP emulation for unmodified NVIDIA guest drivers

	Commit message (Collapse)	Author	Age
*	tools/guest-diag: decode engine-list, classlist and CE-cap RM control ↵	Arthur Hanson Rasmusson	2026-09-26
\| \| \| \|	replies in the ioctl tracer
*	kernel: coherent GSP-RM replies for engine-context creation	Arthur Hanson Rasmusson	2026-09-23
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	- GSP_RM_ALLOC: echo the request payload back with status forced to NV_OK. The kernel driver copies the reply params over the caller's params buffer using the class-expected size, so a zeroed reply smashed libcuda's stack (SIGSEGV at the engine-registration continuation); echoing makes the copy-back idempotent. - CE_GET_PHYSICAL_CAPS / CE_GET_ALL(_PHYSICAL)_CAPS: report sysmem, P2P and BL copy caps and mark the GR-synchronous CE (GRCE, COPY0). Without a GRCE the client's context walk ends with an empty secondary-engine record and the engine RM alloc is issued with class 0 (rejected -> cuCtxCreate fails). - TU104 engine table: CE0 shares the GR PBDMA ids (the driver's GR/GRCE runqueue validation requires it), plus an entry for the async copy engine (COPY14) advertised in the GSP static info engine caps. - tools/guest-diag/ioctl_trace: decode the RM status fields of alloc, control and free so the first failing driver call is visible in traces. gitignore: keep the CUDA analysis scratch tree (incl. WORKING-HERE.md) local.
*	userspace/cuda: libcuda analysis tree (debug-focused), guest ioctl tracer	Arthur Hanson Rasmusson	2026-09-23
	Analysis tooling for debugging CUDA execution in Open-IOV guests: - userspace/cuda/570.144/: fetch a library from a running guest (nc), objdump helpers, crash ip -> file vaddr + symbol mapping, and Ghidra headless import/analysis/decompile scripts (project kept so single functions decompile in seconds). The purpose is debugging correctness and performance of CUDA in Open-IOV VMs (not a reimplementation); extracted binaries and decompiled output are gitignored. - tools/guest-diag/ioctl_trace.c: ptrace tracker for the NVIDIA driver ioctls of a child (libcuda issues raw syscalls, so LD_PRELOAD sees nothing). Decodes RM_ALLOC (class) and RM_CONTROL (cmd) arguments; this is how the cuCtxCreate crash sequence was captured. - tools/test/cuda_drv_test.c: unbuffered + per-call markers so a crash identifies the CUDA call it happened in.